If you want to really fuck with Facebook, you can prevent people from following links from Facebook-owned sites to your website. Just add a rewrite condition to your .htaccess file for all of the domains in the above list.
http://www.htaccess-guide.com/deny-visit...-referrer/
htaccess-guide.com Wrote:To set-up block multiple referrers, create a .htaccess file following the main instructions and guidance which includes the following text:
RewriteEngine on
# Options +FollowSymlinks
RewriteCond %{HTTP_REFERER} otherdomain\.com [NC,OR]
RewriteCond %{HTTP_REFERER} anotherdomain\.com
RewriteRule .* - [F]
The above lines tell the Apache Web Server to block traffic from the URL 'otherdomain.com' and 'anotherdomain.com'. Note the backslash before the dot, this is important, e.g. 'domain\.com'. The only difference between blocking a single referrer and multiple referrers is the modified [NC, OR] flag in the multiple referrers example, this should be added to every domain except the last.
http://www.htaccess-guide.com/deny-visit...-referrer/
